Tool-holder.



D. B. HYDE.

TOOL HOLDER.

(Appli cation filed Feb. 27, 1899.)

(No Model.)

j I 5 jig; 9

m4 5| "mm wz'zzzewes: f7Z?/67ZZ07'.'

JZZ02726 y.

'NITIED STATES.

DAVID B. HYDE, OF SPRINGFIELD,

OHIO, ASSIGNOR TO THE WESTERN MANUFACTURING COMPANY, OF SAME PLACE.

TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 648,07 5, dated April 24, .1900.

Application filed February 27, 1899. Serial No. 706,965. N model.)

' field, in the county of Clark and State of Ohio,

have invented certain new and useful Improvements in Tool-Holders, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates to certain new and useful improvements in tool-holders for lathes, particularly adapted for shaping metal.

The object of my invention is to provide means for holding and supporting a cuttingtool in such a manner that the tool may be held rigidlyin the holder even afterit becomes very short, due to constant regrinding; and to that end my invention has reference to a support formed integral with the tool-holder or otherwise secured thereto and projecting beyond the same sufficiently to form an extended bearing for the cutting-tool to be held much more rigidly in a fixed position.

My invention also relates to details of construction hereinafter appearing, and particularly pointed out in the claims.

In the accompanying drawings, on which like reference letters and figures indicate corresponding parts, Figure l is a side elevation of my improved tool-holder, showing the cutting-tool secured therein. Fig. 2 is a plan View of what is shown in Fig. 1; Fig. 3, an end elevation; Fig. 4, a side elevation of the toolholder, showing the support formed of a separate piece and secured therein; and Fig. 5, a detail sectional view looking in the direction of the arrows, the section being taken onthe line a: so of Fig. at.

In cutting-tools of this general character it is very essential that the tool be held rigidly within the holder, so that the tool will not be permitted to vibrate up and down and thereby cause the work operated upon to be slightly rough or uneven. I do not wish to lay claim to a tool-holder having a recess or channel therein, within which recess or channel fits a cutting-tool; but such tool-holders without my improvements have heretofore been more or less defective, particularly when the cutting-tool has been reground a number of times, so as to shorten it very materially, be-

cause in that event more or less wear was brought to bear on the corner A, along the lower edge of the cutting-tool channel B, cast or otherwise formed in the tool-holder O, for the reason that the set-screw D was so nearly over the lower edge A that the cutting-tool while in operation fulcru med, as it were, about said lower edge. In practice this edge gradually wore down, and when the cuttingwould not maintain its set position within the ance and positive detriment. This difficulty I have overcome by projecting from the toolholder a support E, which is preferably practically the same width as the cutting-tool, and consequently forms a support therefor along its under side beyond the holder proper. This support is preferably formed integral with said holder proper, although it will readily be understood that, if desired, it might be formed in any other suitable manner, such as by pro jecting cess in the holder proper and securing it therein by means of rivets, as shown in Fig. 5, its outer end projecting the same as in the preouter end of the support, as also the outer end of the tool-holder, is beveled, the support from its upper edge downward and backward to its lower edge, as shown at 3, while the toolholder is beveled from the upper edgeof the slot or recess 2 downward and rearward to its lower edge and upward and rearward to its upper edge, as shown at H and I, respectively. These bevels permit the cutting-tool to be worked closer'to the tool-holder without their interfering with the work of cutting than would otherwise be the case. Referring now to the cuttingtool itself, it will be observed that it is beveled downward and rearward from its upper edge and is also beveled from substantially midway between its sides rearward, as shown at a, and I), respectively, for the purpose of permitting the tool to operate more readily without clogging.

I'do not wish to confine myself to any particular shape of cutting-tool, as it is obvious that numerous shapes and forms of cutting tools may be employed, the essential feature tool became too short, as above described, it

holder, which was a source of great annoya separate piece of metal within a referred form. It will also be'observed that the I nel, a cutting-tool adapted to be inserted within said channel and be secured therein and supported by said support, the support having its vertical faces or edges substantially in line with the vertical faces of said cuttingtool, substantially as shown and described.

2. The combination with a too1-holder having a recess therein, a support adapted to extend within said recess and beyond said toolholder and secured thereto and having its projecting end of substan tially the same width as said channel, of a cutting-tool adapted to extend Within a,channel formed Within the tool-holder between it and said support, and a screw adapted to screw upon said cuttingtool to hold it firmly within said channel.

3. The combination with a tool-holder having a recess therein and beveled downward and upward rearwardly from the upper edge of said recess, a cutting-tool adapted to project Within said recess as also a support therefor, said support being secured to said toolholder and projecting beyond the same to form an extended support for said tool, said support being of less Width than said holder, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID B. HYDE.

Witnesses:

B. BLACKBURN ESTERLINE, A. C. SLAGLE. 

